How do aquatic animals filter out the water they swallow while eating, from the prey?

Question

how does it work?

In: 6

Answer 1

Whales snatch up a load of water including little fish, krill, plankton and whatever the hell. Once they close their mouth their brushlike teeth kinda lock so they can remove as much water as possible without loosing their prey. Swallow. Repeat.

For dolphins, Seals and others try eating an apple underwater, after a couple bites you know how to eat underwater without swalloing much water